./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 14:11:00,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:11:00,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:11:00,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:11:00,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:11:00,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:11:00,241 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:11:00,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:11:00,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:11:00,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:11:00,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:11:00,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:11:00,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:11:00,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:11:00,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:11:00,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:11:00,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:11:00,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:11:00,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:11:00,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:11:00,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:11:00,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:11:00,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:11:00,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:11:00,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:11:00,260 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:11:00,260 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:11:00,261 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:11:00,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:11:00,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:11:00,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:11:00,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:11:00,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:11:00,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:11:00,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:11:00,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:11:00,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:11:00,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:11:00,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:11:00,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:11:00,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:11:00,269 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 14:11:00,292 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:11:00,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:11:00,292 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:11:00,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:11:00,293 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:11:00,293 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:11:00,293 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:11:00,294 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:11:00,294 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:11:00,294 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:11:00,294 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:11:00,294 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:11:00,294 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:11:00,295 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:11:00,295 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:11:00,295 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:11:00,295 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:11:00,295 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:11:00,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:11:00,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:11:00,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:11:00,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:11:00,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:11:00,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:11:00,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:11:00,297 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:11:00,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:11:00,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:11:00,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:11:00,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:11:00,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:11:00,299 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:11:00,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:11:00,299 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:11:00,299 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:11:00,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:11:00,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:11:00,300 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:11:00,300 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d [2022-12-14 14:11:00,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:11:00,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:11:00,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:11:00,512 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:11:00,512 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:11:00,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2022-12-14 14:11:03,113 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:11:03,375 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:11:03,376 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2022-12-14 14:11:03,392 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/data/a430d5272/08f703bb4fc242379bffd8dc1f960214/FLAG17a8f7cf6 [2022-12-14 14:11:03,704 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/data/a430d5272/08f703bb4fc242379bffd8dc1f960214 [2022-12-14 14:11:03,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:11:03,714 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:11:03,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:11:03,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:11:03,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:11:03,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:11:03" (1/1) ... [2022-12-14 14:11:03,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c7151c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:11:03, skipping insertion in model container [2022-12-14 14:11:03,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:11:03" (1/1) ... [2022-12-14 14:11:03,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:11:03,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:11:04,051 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2022-12-14 14:11:04,058 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2022-12-14 14:11:04,639 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 14:11:04,645 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:04,646 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:04,647 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:04,648 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:04,649 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:04,664 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:04,665 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:04,666 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:04,667 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:04,669 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:04,670 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:04,670 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:04,671 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:04,730 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 14:11:04,730 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 14:11:04,731 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 14:11:04,734 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 14:11:04,735 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 14:11:04,735 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 14:11:04,952 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 14:11:04,953 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 14:11:04,954 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 14:11:04,954 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 14:11:04,955 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 14:11:04,956 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 14:11:04,956 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 14:11:04,957 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 14:11:04,957 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 14:11:04,958 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 14:11:04,958 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 14:11:05,067 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 14:11:05,093 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:11:05,105 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:11:05,114 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2022-12-14 14:11:05,115 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2022-12-14 14:11:05,138 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 14:11:05,140 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:05,140 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:05,141 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:05,141 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:05,141 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:05,146 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:05,146 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:05,147 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:05,147 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:05,148 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:05,148 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:05,149 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:05,149 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 14:11:05,153 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 14:11:05,154 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 14:11:05,154 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 14:11:05,156 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 14:11:05,157 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 14:11:05,157 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 14:11:05,172 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 14:11:05,173 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 14:11:05,173 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 14:11:05,174 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 14:11:05,174 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 14:11:05,175 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 14:11:05,175 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 14:11:05,176 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 14:11:05,176 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 14:11:05,176 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 14:11:05,177 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 14:11:05,193 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 14:11:05,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:11:05,339 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:11:05,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:11:05 WrapperNode [2022-12-14 14:11:05,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:11:05,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:11:05,341 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:11:05,341 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:11:05,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:11:05" (1/1) ... [2022-12-14 14:11:05,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:11:05" (1/1) ... [2022-12-14 14:11:05,435 INFO L138 Inliner]: procedures = 679, calls = 1079, calls flagged for inlining = 51, calls inlined = 5, statements flattened = 213 [2022-12-14 14:11:05,436 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:11:05,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:11:05,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:11:05,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:11:05,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:11:05" (1/1) ... [2022-12-14 14:11:05,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:11:05" (1/1) ... [2022-12-14 14:11:05,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:11:05" (1/1) ... [2022-12-14 14:11:05,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:11:05" (1/1) ... [2022-12-14 14:11:05,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:11:05" (1/1) ... [2022-12-14 14:11:05,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:11:05" (1/1) ... [2022-12-14 14:11:05,473 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:11:05" (1/1) ... [2022-12-14 14:11:05,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:11:05" (1/1) ... [2022-12-14 14:11:05,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:11:05,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:11:05,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:11:05,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:11:05,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:11:05" (1/1) ... [2022-12-14 14:11:05,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:11:05,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:11:05,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:11:05,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:11:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2022-12-14 14:11:05,546 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2022-12-14 14:11:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 14:11:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 14:11:05,546 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 14:11:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-12-14 14:11:05,546 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-12-14 14:11:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_linked_list_is_allocated [2022-12-14 14:11:05,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_linked_list_is_allocated [2022-12-14 14:11:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 14:11:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-12-14 14:11:05,547 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-12-14 14:11:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:11:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 14:11:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:11:05,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:11:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-12-14 14:11:05,547 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-12-14 14:11:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 14:11:05,547 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 14:11:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 14:11:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 14:11:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 14:11:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-12-14 14:11:05,548 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-12-14 14:11:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:11:05,749 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:11:05,751 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:11:06,072 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:11:06,144 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:11:06,145 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 14:11:06,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:11:06 BoogieIcfgContainer [2022-12-14 14:11:06,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:11:06,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:11:06,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:11:06,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:11:06,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:11:03" (1/3) ... [2022-12-14 14:11:06,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c123ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:11:06, skipping insertion in model container [2022-12-14 14:11:06,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:11:05" (2/3) ... [2022-12-14 14:11:06,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c123ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:11:06, skipping insertion in model container [2022-12-14 14:11:06,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:11:06" (3/3) ... [2022-12-14 14:11:06,155 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_swap_contents_harness.i [2022-12-14 14:11:06,169 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:11:06,169 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:11:06,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:11:06,210 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2413966f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:11:06,211 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:11:06,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 48 states have internal predecessors, (57), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 14:11:06,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 14:11:06,222 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:11:06,222 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:11:06,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:11:06,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:11:06,227 INFO L85 PathProgramCache]: Analyzing trace with hash -499476916, now seen corresponding path program 1 times [2022-12-14 14:11:06,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:11:06,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587479446] [2022-12-14 14:11:06,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:06,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:11:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 14:11:06,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:11:06,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587479446] [2022-12-14 14:11:06,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587479446] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:11:06,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985968933] [2022-12-14 14:11:06,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:06,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:11:06,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:11:06,941 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:11:06,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:11:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:07,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 14:11:07,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:11:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 14:11:07,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:11:07,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985968933] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:11:07,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:11:07,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 9 [2022-12-14 14:11:07,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835504125] [2022-12-14 14:11:07,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:11:07,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 14:11:07,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:11:07,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 14:11:07,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 14:11:07,395 INFO L87 Difference]: Start difference. First operand has 89 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 48 states have internal predecessors, (57), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 7 states, 4 states have (on average 6.25) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 14:11:07,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:11:07,800 INFO L93 Difference]: Finished difference Result 166 states and 254 transitions. [2022-12-14 14:11:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:11:07,803 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 4 states have (on average 6.25) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 62 [2022-12-14 14:11:07,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:11:07,811 INFO L225 Difference]: With dead ends: 166 [2022-12-14 14:11:07,812 INFO L226 Difference]: Without dead ends: 87 [2022-12-14 14:11:07,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:11:07,818 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 42 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:11:07,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 463 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:11:07,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-12-14 14:11:07,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-12-14 14:11:07,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 43 states have (on average 1.255813953488372) internal successors, (54), 48 states have internal predecessors, (54), 34 states have call successors, (34), 8 states have call predecessors, (34), 9 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2022-12-14 14:11:07,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 126 transitions. [2022-12-14 14:11:07,863 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 126 transitions. Word has length 62 [2022-12-14 14:11:07,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:11:07,864 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 126 transitions. [2022-12-14 14:11:07,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 4 states have (on average 6.25) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 14:11:07,864 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 126 transitions. [2022-12-14 14:11:07,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 14:11:07,867 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:11:07,867 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:11:07,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:11:08,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 14:11:08,069 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:11:08,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:11:08,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1294681424, now seen corresponding path program 1 times [2022-12-14 14:11:08,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:11:08,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435941633] [2022-12-14 14:11:08,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:08,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:11:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 14:11:08,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:11:08,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435941633] [2022-12-14 14:11:08,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435941633] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:11:08,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582129137] [2022-12-14 14:11:08,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:08,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:11:08,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:11:08,460 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:11:08,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:11:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:08,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:11:08,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:11:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 14:11:08,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:11:08,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582129137] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:11:08,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:11:08,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-12-14 14:11:08,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224347194] [2022-12-14 14:11:08,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:11:08,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 14:11:08,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:11:08,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 14:11:08,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-14 14:11:08,784 INFO L87 Difference]: Start difference. First operand 87 states and 126 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 14:11:09,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:11:09,093 INFO L93 Difference]: Finished difference Result 163 states and 243 transitions. [2022-12-14 14:11:09,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:11:09,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 64 [2022-12-14 14:11:09,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:11:09,095 INFO L225 Difference]: With dead ends: 163 [2022-12-14 14:11:09,095 INFO L226 Difference]: Without dead ends: 90 [2022-12-14 14:11:09,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-14 14:11:09,098 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 64 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:11:09,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 427 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:11:09,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-14 14:11:09,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-12-14 14:11:09,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 51 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2022-12-14 14:11:09,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 132 transitions. [2022-12-14 14:11:09,116 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 132 transitions. Word has length 64 [2022-12-14 14:11:09,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:11:09,117 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 132 transitions. [2022-12-14 14:11:09,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 14:11:09,117 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 132 transitions. [2022-12-14 14:11:09,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 14:11:09,119 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:11:09,119 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:11:09,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 14:11:09,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:11:09,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:11:09,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:11:09,321 INFO L85 PathProgramCache]: Analyzing trace with hash -316448838, now seen corresponding path program 1 times [2022-12-14 14:11:09,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:11:09,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723193697] [2022-12-14 14:11:09,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:09,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:11:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 14:11:09,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:11:09,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723193697] [2022-12-14 14:11:09,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723193697] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:11:09,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66136986] [2022-12-14 14:11:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:09,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:11:09,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:11:09,688 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:11:09,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:11:09,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:09,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 14:11:09,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:11:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 14:11:10,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:11:10,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66136986] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:11:10,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:11:10,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-12-14 14:11:10,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778248969] [2022-12-14 14:11:10,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:11:10,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 14:11:10,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:11:10,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 14:11:10,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-12-14 14:11:10,056 INFO L87 Difference]: Start difference. First operand 90 states and 132 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 14:11:10,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:11:10,384 INFO L93 Difference]: Finished difference Result 178 states and 274 transitions. [2022-12-14 14:11:10,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 14:11:10,385 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 66 [2022-12-14 14:11:10,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:11:10,386 INFO L225 Difference]: With dead ends: 178 [2022-12-14 14:11:10,386 INFO L226 Difference]: Without dead ends: 102 [2022-12-14 14:11:10,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-12-14 14:11:10,387 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 94 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:11:10,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 499 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:11:10,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-14 14:11:10,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2022-12-14 14:11:10,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 53 states have internal predecessors, (59), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2022-12-14 14:11:10,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 135 transitions. [2022-12-14 14:11:10,398 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 135 transitions. Word has length 66 [2022-12-14 14:11:10,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:11:10,398 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 135 transitions. [2022-12-14 14:11:10,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 14:11:10,398 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 135 transitions. [2022-12-14 14:11:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 14:11:10,399 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:11:10,399 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:11:10,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 14:11:10,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:11:10,600 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:11:10,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:11:10,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1529797791, now seen corresponding path program 1 times [2022-12-14 14:11:10,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:11:10,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833643104] [2022-12-14 14:11:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:10,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:11:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:10,998 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 14:11:10,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:11:10,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833643104] [2022-12-14 14:11:10,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833643104] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:11:10,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846040071] [2022-12-14 14:11:10,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:10,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:11:10,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:11:11,000 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:11:11,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:11:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:11,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:11:11,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:11:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 14:11:11,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:11:11,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846040071] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:11:11,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:11:11,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-12-14 14:11:11,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589449220] [2022-12-14 14:11:11,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:11:11,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:11:11,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:11:11,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:11:11,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 14:11:11,337 INFO L87 Difference]: Start difference. First operand 92 states and 135 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-14 14:11:11,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:11:11,383 INFO L93 Difference]: Finished difference Result 179 states and 282 transitions. [2022-12-14 14:11:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:11:11,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2022-12-14 14:11:11,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:11:11,385 INFO L225 Difference]: With dead ends: 179 [2022-12-14 14:11:11,385 INFO L226 Difference]: Without dead ends: 101 [2022-12-14 14:11:11,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 14:11:11,387 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:11:11,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 220 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:11:11,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-12-14 14:11:11,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2022-12-14 14:11:11,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 48 states have (on average 1.25) internal successors, (60), 54 states have internal predecessors, (60), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2022-12-14 14:11:11,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 136 transitions. [2022-12-14 14:11:11,402 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 136 transitions. Word has length 67 [2022-12-14 14:11:11,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:11:11,402 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 136 transitions. [2022-12-14 14:11:11,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-14 14:11:11,403 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 136 transitions. [2022-12-14 14:11:11,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 14:11:11,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:11:11,404 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:11:11,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 14:11:11,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:11:11,605 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:11:11,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:11:11,605 INFO L85 PathProgramCache]: Analyzing trace with hash -435365079, now seen corresponding path program 1 times [2022-12-14 14:11:11,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:11:11,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573755630] [2022-12-14 14:11:11,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:11,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:11:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 14:11:11,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:11:11,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573755630] [2022-12-14 14:11:11,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573755630] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:11:11,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52753872] [2022-12-14 14:11:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:11,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:11:11,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:11:11,969 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:11:11,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 14:11:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:12,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 14:11:12,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:11:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 14:11:12,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:11:12,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52753872] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:11:12,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:11:12,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 10 [2022-12-14 14:11:12,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631204843] [2022-12-14 14:11:12,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:11:12,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 14:11:12,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:11:12,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 14:11:12,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:11:12,348 INFO L87 Difference]: Start difference. First operand 93 states and 136 transitions. Second operand has 8 states, 5 states have (on average 6.2) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 14:11:12,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:11:12,609 INFO L93 Difference]: Finished difference Result 178 states and 269 transitions. [2022-12-14 14:11:12,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 14:11:12,610 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 6.2) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 70 [2022-12-14 14:11:12,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:11:12,611 INFO L225 Difference]: With dead ends: 178 [2022-12-14 14:11:12,611 INFO L226 Difference]: Without dead ends: 99 [2022-12-14 14:11:12,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-12-14 14:11:12,612 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 39 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:11:12,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 555 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:11:12,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-14 14:11:12,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2022-12-14 14:11:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 55 states have internal predecessors, (61), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2022-12-14 14:11:12,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 137 transitions. [2022-12-14 14:11:12,620 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 137 transitions. Word has length 70 [2022-12-14 14:11:12,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:11:12,621 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 137 transitions. [2022-12-14 14:11:12,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 6.2) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 14:11:12,621 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 137 transitions. [2022-12-14 14:11:12,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 14:11:12,622 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:11:12,622 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:11:12,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 14:11:12,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:11:12,823 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:11:12,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:11:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash -738794669, now seen corresponding path program 1 times [2022-12-14 14:11:12,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:11:12,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140066402] [2022-12-14 14:11:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:12,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:11:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 14:11:13,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:11:13,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140066402] [2022-12-14 14:11:13,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140066402] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:11:13,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192835200] [2022-12-14 14:11:13,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:13,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:11:13,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:11:13,888 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:11:13,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 14:11:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:14,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-14 14:11:14,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:11:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 14:11:16,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:11:16,798 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 14:11:16,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192835200] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:11:16,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1222565718] [2022-12-14 14:11:16,813 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-12-14 14:11:16,813 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:11:16,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:11:16,819 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:11:16,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:11:16,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:16,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:16,938 INFO L321 Elim1Store]: treesize reduction 83, result has 33.6 percent of original size [2022-12-14 14:11:16,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 64 [2022-12-14 14:11:16,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:16,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,043 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-12-14 14:11:17,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2022-12-14 14:11:17,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:11:17,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:11:17,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 14:11:17,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 14:11:17,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-12-14 14:11:17,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:11:17,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 43 [2022-12-14 14:11:17,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:11:17,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-12-14 14:11:17,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-12-14 14:11:17,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-12-14 14:11:17,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-14 14:11:17,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-14 14:11:17,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-12-14 14:11:17,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-12-14 14:11:17,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-12-14 14:11:17,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 15 [2022-12-14 14:11:17,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-12-14 14:11:17,576 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:11:17,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 15 [2022-12-14 14:11:17,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:17,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-12-14 14:11:17,750 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:11:17,899 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-12-14 14:11:17,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2022-12-14 14:11:17,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-12-14 14:11:23,113 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 165 for LOIs [2022-12-14 14:11:24,435 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_linked_list_is_allocated with input of size 22 for LOIs [2022-12-14 14:11:24,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:11:24,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:11:24,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 14:11:24,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 14:11:24,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:11:24,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-12-14 14:11:24,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 43 [2022-12-14 14:11:24,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:11:24,571 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-12-14 14:11:24,572 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 15 for LOIs [2022-12-14 14:11:24,573 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 14:11:24,626 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:11:31,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1222565718] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:11:31,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:11:31,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [9, 9, 6] total 42 [2022-12-14 14:11:31,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697100817] [2022-12-14 14:11:31,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:11:31,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 14:11:31,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:11:31,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 14:11:31,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1554, Unknown=1, NotChecked=0, Total=1722 [2022-12-14 14:11:31,159 INFO L87 Difference]: Start difference. First operand 94 states and 137 transitions. Second operand has 24 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-12-14 14:11:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:11:36,410 INFO L93 Difference]: Finished difference Result 223 states and 321 transitions. [2022-12-14 14:11:36,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 14:11:36,410 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 72 [2022-12-14 14:11:36,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:11:36,412 INFO L225 Difference]: With dead ends: 223 [2022-12-14 14:11:36,413 INFO L226 Difference]: Without dead ends: 127 [2022-12-14 14:11:36,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 176 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=274, Invalid=2275, Unknown=1, NotChecked=0, Total=2550 [2022-12-14 14:11:36,415 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 161 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:11:36,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 693 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 14:11:36,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-12-14 14:11:36,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2022-12-14 14:11:36,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 73 states have internal predecessors, (81), 39 states have call successors, (39), 10 states have call predecessors, (39), 13 states have return successors, (49), 37 states have call predecessors, (49), 37 states have call successors, (49) [2022-12-14 14:11:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2022-12-14 14:11:36,436 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2022-12-14 14:11:36,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:11:36,436 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2022-12-14 14:11:36,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-12-14 14:11:36,436 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2022-12-14 14:11:36,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 14:11:36,437 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:11:36,437 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:11:36,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 14:11:36,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 14:11:36,639 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:11:36,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:11:36,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1737616664, now seen corresponding path program 1 times [2022-12-14 14:11:36,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:11:36,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083073948] [2022-12-14 14:11:36,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:36,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:11:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 14:11:36,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:11:36,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083073948] [2022-12-14 14:11:36,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083073948] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:11:36,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973077355] [2022-12-14 14:11:36,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:36,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:11:36,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:11:36,903 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:11:36,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 14:11:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:37,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 14:11:37,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:11:37,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 14:11:37,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 14:11:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 14:11:37,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:11:37,818 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:11:37,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2022-12-14 14:11:37,828 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:11:37,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-12-14 14:11:37,902 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 14:11:37,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973077355] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:11:37,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1711273586] [2022-12-14 14:11:37,906 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-12-14 14:11:37,906 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:11:37,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:11:37,907 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:11:37,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:11:37,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:37,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,006 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-12-14 14:11:38,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2022-12-14 14:11:38,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 17 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 43 [2022-12-14 14:11:38,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 14:11:38,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:11:38,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:11:38,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 14:11:38,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 43 [2022-12-14 14:11:38,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:11:38,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:11:38,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-12-14 14:11:38,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-12-14 14:11:38,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-12-14 14:11:38,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-14 14:11:38,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-12-14 14:11:38,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-12-14 14:11:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-14 14:11:38,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-12-14 14:11:38,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-12-14 14:11:38,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 15 [2022-12-14 14:11:38,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:38,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-12-14 14:11:38,463 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:11:38,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:11:38,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 31 [2022-12-14 14:11:38,594 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-12-14 14:11:38,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 18 [2022-12-14 14:11:38,606 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 14:11:38,710 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 14:11:38,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2022-12-14 14:11:38,734 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-12-14 14:11:38,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2022-12-14 14:11:51,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:51,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:51,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:51,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:51,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:11:51,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:11:51,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:51,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:51,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:51,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:51,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:11:51,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:51,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:51,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:11:51,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:51,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:51,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:51,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:51,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:11:51,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:11:51,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:11:51,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:11:51,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:11:51,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:11:51,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:51,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:51,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:11:51,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:11:51,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:11:51,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:11:51,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:11:51,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:11:51,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:11:55,206 INFO L321 Elim1Store]: treesize reduction 4691, result has 0.0 percent of original size [2022-12-14 14:11:55,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 24 select indices, 24 select index equivalence classes, 12 disjoint index pairs (out of 276 index pairs), introduced 29 new quantified variables, introduced 302 case distinctions, treesize of input 3537 treesize of output 1 [2022-12-14 14:12:00,364 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 200 for LOIs [2022-12-14 14:12:01,357 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-12-14 14:12:01,907 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_linked_list_is_allocated with input of size 22 for LOIs [2022-12-14 14:12:01,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:12:01,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 14:12:01,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:12:01,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 14:12:01,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 43 [2022-12-14 14:12:01,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:12:02,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-12-14 14:12:02,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:12:02,022 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 40 for LOIs [2022-12-14 14:12:02,029 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 15 for LOIs [2022-12-14 14:12:02,030 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 14:12:02,073 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:12:14,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1711273586] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:12:14,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:12:14,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [5, 12, 9] total 48 [2022-12-14 14:12:14,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366941150] [2022-12-14 14:12:14,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:12:14,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 14:12:14,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:12:14,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 14:12:14,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 14:12:14,279 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand has 32 states, 21 states have (on average 1.380952380952381) internal successors, (29), 19 states have internal predecessors, (29), 10 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-14 14:12:19,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:12:19,324 INFO L93 Difference]: Finished difference Result 236 states and 335 transitions. [2022-12-14 14:12:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 14:12:19,325 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 21 states have (on average 1.380952380952381) internal successors, (29), 19 states have internal predecessors, (29), 10 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) Word has length 73 [2022-12-14 14:12:19,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:12:19,327 INFO L225 Difference]: With dead ends: 236 [2022-12-14 14:12:19,327 INFO L226 Difference]: Without dead ends: 159 [2022-12-14 14:12:19,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 158 SyntacticMatches, 18 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=269, Invalid=2593, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 14:12:19,328 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 144 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 2043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:12:19,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 636 Invalid, 2043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2033 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-12-14 14:12:19,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-12-14 14:12:19,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 143. [2022-12-14 14:12:19,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 88 states have internal predecessors, (102), 45 states have call successors, (45), 12 states have call predecessors, (45), 15 states have return successors, (55), 44 states have call predecessors, (55), 43 states have call successors, (55) [2022-12-14 14:12:19,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 202 transitions. [2022-12-14 14:12:19,362 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 202 transitions. Word has length 73 [2022-12-14 14:12:19,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:12:19,363 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 202 transitions. [2022-12-14 14:12:19,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 21 states have (on average 1.380952380952381) internal successors, (29), 19 states have internal predecessors, (29), 10 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-14 14:12:19,363 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 202 transitions. [2022-12-14 14:12:19,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 14:12:19,363 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:12:19,363 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:12:19,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 14:12:19,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 14:12:19,565 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:12:19,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:12:19,566 INFO L85 PathProgramCache]: Analyzing trace with hash 176352278, now seen corresponding path program 1 times [2022-12-14 14:12:19,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:12:19,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874530050] [2022-12-14 14:12:19,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:12:19,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:12:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:12:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 14:12:20,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:12:20,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874530050] [2022-12-14 14:12:20,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874530050] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:12:20,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22965373] [2022-12-14 14:12:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:12:20,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:12:20,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:12:20,419 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:12:20,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 14:12:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:12:20,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-14 14:12:20,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:12:20,829 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 14:12:20,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 14:12:20,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 14:12:20,908 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 14:12:20,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 14:12:20,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 14:12:20,955 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-12-14 14:12:20,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 87 [2022-12-14 14:12:20,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 14:12:20,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 30 [2022-12-14 14:12:21,017 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-12-14 14:12:21,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 31 [2022-12-14 14:12:21,020 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:12:21,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2022-12-14 14:12:21,068 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-14 14:12:21,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 14:12:21,157 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_17 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26|))) (let ((.cse0 (select .cse1 0))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_18) .cse0 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_18) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= (select v_DerPreprocessor_18 24) (select .cse1 24)) (not (= |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| .cse0)))))) is different from true [2022-12-14 14:12:21,467 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_19 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26|))) (let ((.cse0 (select .cse1 0))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_19) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_20) .cse0 v_DerPreprocessor_19) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_20) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (not (= |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| .cse0)) (= (select .cse1 24) (select v_DerPreprocessor_20 24)))))) (exists ((v_DerPreprocessor_17 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| Int)) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27|))) (let ((.cse2 (select .cse3 0))) (and (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| v_DerPreprocessor_18) .cse2 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| v_DerPreprocessor_18) .cse2)) (not (= .cse2 |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27|)) (= (select .cse3 24) (select v_DerPreprocessor_18 24))))))) is different from true [2022-12-14 14:12:21,485 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_19 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26|))) (let ((.cse0 (select .cse1 0))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_19) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_20) .cse0 v_DerPreprocessor_19) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_20) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (not (= |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| .cse0)) (= (select .cse1 24) (select v_DerPreprocessor_20 24)))))) (exists ((v_DerPreprocessor_17 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| Int)) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27|))) (let ((.cse2 (select .cse3 0))) (and (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| v_DerPreprocessor_18) .cse2 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| v_DerPreprocessor_18) .cse2)) (not (= .cse2 |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27|)) (= (select .cse3 24) (select v_DerPreprocessor_18 24)))))) (not (= (mod |c_assume_abort_if_not_#in~cond| 256) 0))) is different from true [2022-12-14 14:12:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 14:12:21,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:12:21,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-12-14 14:12:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 14:12:21,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22965373] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:12:21,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1072866282] [2022-12-14 14:12:21,799 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-12-14 14:12:21,799 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:12:21,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:12:21,800 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:12:21,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:12:21,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:21,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:21,890 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-12-14 14:12:21,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2022-12-14 14:12:21,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:21,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:21,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 17 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 43 [2022-12-14 14:12:21,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 14:12:21,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 14:12:21,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:12:21,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:12:21,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 14:12:21,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:21,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,032 INFO L321 Elim1Store]: treesize reduction 64, result has 41.8 percent of original size [2022-12-14 14:12:22,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 61 [2022-12-14 14:12:22,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 14:12:22,073 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 14:12:22,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-12-14 14:12:22,105 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 14:12:22,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-12-14 14:12:22,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,160 INFO L321 Elim1Store]: treesize reduction 66, result has 40.0 percent of original size [2022-12-14 14:12:22,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 59 [2022-12-14 14:12:22,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 14:12:22,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 14:12:22,211 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-12-14 14:12:22,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 14:12:22,245 INFO L321 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-12-14 14:12:22,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 29 [2022-12-14 14:12:22,278 INFO L321 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-12-14 14:12:22,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 29 [2022-12-14 14:12:22,302 INFO L321 Elim1Store]: treesize reduction 31, result has 48.3 percent of original size [2022-12-14 14:12:22,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 39 [2022-12-14 14:12:22,324 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 14:12:22,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-12-14 14:12:22,335 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-12-14 14:12:22,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 14:12:22,356 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 14:12:22,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-12-14 14:12:22,376 INFO L321 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2022-12-14 14:12:22,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2022-12-14 14:12:22,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-12-14 14:12:22,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-14 14:12:22,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-12-14 14:12:22,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-12-14 14:12:22,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-14 14:12:22,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-12-14 14:12:22,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-12-14 14:12:22,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:22,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-12-14 14:12:22,591 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 14:12:22,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2022-12-14 14:12:22,611 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-12-14 14:12:22,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2022-12-14 14:12:23,100 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 106 for LOIs [2022-12-14 14:12:23,662 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_linked_list_is_allocated with input of size 156 for LOIs [2022-12-14 14:12:25,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 14:12:25,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:25,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 14:12:25,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:12:25,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:25,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 14:12:25,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:25,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 14:12:25,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:25,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 14:12:25,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 14:12:25,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:25,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:12:25,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:25,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 14:12:25,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:25,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:25,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 14:12:25,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:25,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 14:12:25,730 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-12-14 14:12:25,731 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 134 for LOIs [2022-12-14 14:12:25,767 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 14:12:25,817 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:12:30,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1072866282] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:12:30,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:12:30,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [9, 17, 8] total 51 [2022-12-14 14:12:30,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371737369] [2022-12-14 14:12:30,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:12:30,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 14:12:30,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:12:30,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 14:12:30,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2085, Unknown=13, NotChecked=282, Total=2550 [2022-12-14 14:12:30,718 INFO L87 Difference]: Start difference. First operand 143 states and 202 transitions. Second operand has 23 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2022-12-14 14:12:35,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:12:35,520 INFO L93 Difference]: Finished difference Result 258 states and 362 transitions. [2022-12-14 14:12:35,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 14:12:35,521 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 73 [2022-12-14 14:12:35,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:12:35,522 INFO L225 Difference]: With dead ends: 258 [2022-12-14 14:12:35,522 INFO L226 Difference]: Without dead ends: 178 [2022-12-14 14:12:35,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 167 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=258, Invalid=2701, Unknown=23, NotChecked=324, Total=3306 [2022-12-14 14:12:35,523 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 85 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:12:35,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 330 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-14 14:12:35,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-12-14 14:12:35,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 157. [2022-12-14 14:12:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 94 states have (on average 1.2659574468085106) internal successors, (119), 100 states have internal predecessors, (119), 46 states have call successors, (46), 13 states have call predecessors, (46), 16 states have return successors, (50), 45 states have call predecessors, (50), 44 states have call successors, (50) [2022-12-14 14:12:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 215 transitions. [2022-12-14 14:12:35,558 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 215 transitions. Word has length 73 [2022-12-14 14:12:35,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:12:35,558 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 215 transitions. [2022-12-14 14:12:35,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2022-12-14 14:12:35,558 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 215 transitions. [2022-12-14 14:12:35,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 14:12:35,559 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:12:35,559 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:12:35,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 14:12:35,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:12:35,760 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:12:35,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:12:35,761 INFO L85 PathProgramCache]: Analyzing trace with hash 862134917, now seen corresponding path program 1 times [2022-12-14 14:12:35,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:12:35,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789591711] [2022-12-14 14:12:35,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:12:35,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:12:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:12:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 14:12:36,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:12:36,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789591711] [2022-12-14 14:12:36,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789591711] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:12:36,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171782500] [2022-12-14 14:12:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:12:36,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:12:36,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:12:36,019 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:12:36,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_890efffb-8434-4662-acbe-7c43a5cf1088/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 14:12:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:12:36,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 14:12:36,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:12:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 14:12:36,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:12:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 14:12:36,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171782500] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:12:36,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1082674247] [2022-12-14 14:12:36,567 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-12-14 14:12:36,567 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:12:36,567 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:12:36,567 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:12:36,567 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:12:36,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:36,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:36,660 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-12-14 14:12:36,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2022-12-14 14:12:36,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:36,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:36,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 17 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 43 [2022-12-14 14:12:36,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:12:36,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 14:12:36,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:12:36,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 14:12:36,771 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 14:12:36,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-12-14 14:12:36,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 14:12:36,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:36,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:36,827 INFO L321 Elim1Store]: treesize reduction 66, result has 40.0 percent of original size [2022-12-14 14:12:36,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 59 [2022-12-14 14:12:36,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 14:12:36,865 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 14:12:36,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-12-14 14:12:36,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:36,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:36,914 INFO L321 Elim1Store]: treesize reduction 64, result has 41.8 percent of original size [2022-12-14 14:12:36,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 61 [2022-12-14 14:12:36,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 14:12:36,971 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 14:12:36,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-12-14 14:12:37,002 INFO L321 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-12-14 14:12:37,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 29 [2022-12-14 14:12:37,031 INFO L321 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-12-14 14:12:37,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 29 [2022-12-14 14:12:37,045 INFO L321 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2022-12-14 14:12:37,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 23 [2022-12-14 14:12:37,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 14:12:37,065 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 14:12:37,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-12-14 14:12:37,078 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 14:12:37,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-12-14 14:12:37,086 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-12-14 14:12:37,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 14:12:37,100 INFO L321 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2022-12-14 14:12:37,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2022-12-14 14:12:37,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-12-14 14:12:37,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-12-14 14:12:37,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-12-14 14:12:37,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-14 14:12:37,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-12-14 14:12:37,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-12-14 14:12:37,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-12-14 14:12:37,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:37,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-14 14:12:37,312 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 14:12:37,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2022-12-14 14:12:37,332 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-12-14 14:12:37,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2022-12-14 14:12:38,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:12:38,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:12:38,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:12:38,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:12:38,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:12:38,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:12:38,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:12:38,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:12:38,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:12:38,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:12:38,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:12:38,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:13:11,242 WARN L233 SmtUtils]: Spent 32.92s on a formula simplification. DAG size of input: 473 DAG size of output: 265 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 14:13:11,243 INFO L321 Elim1Store]: treesize reduction 2284, result has 29.0 percent of original size [2022-12-14 14:13:11,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 20 select indices, 20 select index equivalence classes, 15 disjoint index pairs (out of 190 index pairs), introduced 21 new quantified variables, introduced 178 case distinctions, treesize of input 1940 treesize of output 2171 [2022-12-14 14:13:11,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:13:11,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:13:11,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:13:11,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:13:11,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:13:11,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:13:11,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:13:11,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:13:11,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:13:11,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:13:11,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:13:11,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:15:15,361 WARN L233 SmtUtils]: Spent 2.07m on a formula simplification. DAG size of input: 703 DAG size of output: 381 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 14:15:15,362 INFO L321 Elim1Store]: treesize reduction 3329, result has 32.2 percent of original size [2022-12-14 14:15:15,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 20 select indices, 20 select index equivalence classes, 16 disjoint index pairs (out of 190 index pairs), introduced 22 new quantified variables, introduced 215 case distinctions, treesize of input 3110 treesize of output 3808 [2022-12-14 14:15:15,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:15:20,411 INFO L321 Elim1Store]: treesize reduction 459, result has 34.4 percent of original size [2022-12-14 14:15:20,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 524 treesize of output 685 [2022-12-14 14:15:21,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:15:22,681 INFO L321 Elim1Store]: treesize reduction 459, result has 34.4 percent of original size [2022-12-14 14:15:22,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 524 treesize of output 690